:root {
  --paper: #f4f0e8;
  --paper-deep: #e8e0d3;
  --ink: #191815;
  --ink-soft: #625d55;
  --line: rgba(25, 24, 21, 0.18);
  --line-strong: rgba(25, 24, 21, 0.42);
  --surface: #fbf8f2;
  --surface-raised: #fffdf8;
  --copper: #a35e38;
  --copper-dark: #754128;
  --charcoal: #171716;
  --white: #fffdf8;
  --error: #a33e32;
  --font-fa: "Vazirmatn", Tahoma, Arial, sans-serif;
  --font-en: "Manrope", "Helvetica Neue", Arial, sans-serif;
  --header-height: 82px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
}

html[data-theme="dark"] {
  --paper: #111110;
  --paper-deep: #1a1917;
  --ink: #eee8dd;
  --ink-soft: #aba39a;
  --line: rgba(238, 232, 221, 0.16);
  --line-strong: rgba(238, 232, 221, 0.38);
  --surface: #181715;
  --surface-raised: #201e1b;
  --copper: #c77a50;
  --copper-dark: #ad6741;
  --charcoal: #090909;
  --white: #f6f1e8;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { background: var(--paper); scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-fa);
  line-height: 1.65;
  overflow-x: clip;
  transition: background-color .35s ease, color .35s ease;
}

html[lang="en"] body { font-family: var(--font-en); }
body.is-fallback-fullscreen { overflow: hidden; }

button,
input { font: inherit; }

button,
a { -webkit-tap-highlight-color: transparent; }

button { color: inherit; }
button:not(:disabled), a[href], input[type="range"] { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .44; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
svg { fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.6; }
::selection { background: var(--copper); color: var(--white); }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.studio-skip {
  position: fixed;
  z-index: 2000;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.studio-skip:focus { transform: none; }

.studio-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-inline: clamp(20px, 4vw, 64px);
  border-block-end: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(18px) saturate(1.15);
}

.studio-brand { display: flex; align-items: center; gap: 12px; }
.studio-brand > span:last-child { display: flex; flex-direction: column; line-height: 1.2; }
.studio-brand strong { font-size: .84rem; font-weight: 700; }
.studio-brand small { margin-block-start: 3px; color: var(--ink-soft); font-family: var(--font-en); font-size: .48rem; letter-spacing: .12em; }

.studio-brand__mark {
  position: relative;
  width: 30px;
  height: 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  transform: rotate(45deg) scale(.68);
}

.studio-brand__mark i { border: 2px solid currentColor; }
.studio-brand__mark i:nth-child(1), .studio-brand__mark i:nth-child(4) { background: currentColor; }

.studio-header__actions { display: flex; align-items: center; gap: 10px; }

.back-link,
.icon-button,
.language-switcher {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 74%, transparent);
}

.back-link { min-height: 42px; display: inline-flex; align-items: center; gap: 9px; padding: 0 15px; font-size: .7rem; }
.back-link svg { width: 16px; }
html[dir="rtl"] .back-link svg { transform: scaleX(-1); }

.language-switcher { display: flex; padding: 3px; }
.language-switcher button { min-width: 37px; height: 34px; border: 0; background: transparent; color: var(--ink-soft); font-family: var(--font-en); font-size: .58rem; font-weight: 700; transition: background .2s ease, color .2s ease; }
.language-switcher button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.icon-button { position: relative; width: 42px; height: 42px; display: grid; place-items: center; padding: 0; }
.icon-button svg { position: absolute; width: 18px; transition: opacity .25s ease, transform .35s var(--ease-out); }
.icon-moon { opacity: 0; transform: rotate(-20deg) scale(.7); }
html[data-theme="dark"] .icon-sun { opacity: 0; transform: rotate(20deg) scale(.7); }
html[data-theme="dark"] .icon-moon { opacity: 1; transform: none; }

main { width: min(1760px, calc(100% - clamp(28px, 5vw, 96px))); margin-inline: auto; }

.studio-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
  align-items: end;
  gap: clamp(36px, 8vw, 150px);
  padding-block: clamp(62px, 8vw, 120px) clamp(42px, 6vw, 80px);
}

.eyebrow { margin: 0 0 24px; color: var(--ink-soft); font-family: var(--font-en); font-size: .65rem; font-weight: 700; letter-spacing: .15em; }
.studio-intro h1 { margin: 0; font-size: clamp(3rem, 6.3vw, 7.7rem); font-weight: 300; line-height: .94; letter-spacing: -.065em; }
.studio-intro h1 span, .studio-intro h1 em { display: block; }
.studio-intro h1 em { color: var(--copper); font-style: normal; }
.studio-intro > p { max-width: 510px; margin: 0; color: var(--ink-soft); font-size: clamp(.82rem, 1.05vw, 1rem); }

.studio-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 430px);
  align-items: start;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 28px 90px rgba(30, 25, 20, .08);
}

.studio-canvas-column {
  position: sticky;
  inset-block-start: calc(var(--header-height) + 16px);
  min-width: 0;
  padding: clamp(12px, 1.5vw, 22px);
}

.studio-viewport {
  --compare: 100%;
  --camera-x: 0px;
  --camera-y: 0px;
  --camera-scale: 1;
  position: relative;
  isolation: isolate;
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  background: #131312;
  color: #191815;
  user-select: none;
  touch-action: none;
  contain: layout paint;
}

.photo-scene,
.geometry-scene,
.comparison-shade { position: absolute; inset: 0; width: 100%; height: 100%; }

.photo-scene {
  z-index: 1;
  overflow: hidden;
}

.photo-scene > img,
.room-fallback,
.surface-layer,
.geometry-base { position: absolute; inset: 0; width: 100%; height: 100%; }
.photo-scene > img,
.photo-scene > .room-fallback { transform: translate3d(var(--camera-x), var(--camera-y), 0) scale(var(--camera-scale)); transform-origin: 50% 50%; will-change: transform; }
.photo-scene > img { z-index: 1; object-fit: cover; opacity: 1; transition: opacity .35s ease; }
.studio-viewport.is-image-missing .photo-scene > img { opacity: 0; }

.room-fallback {
  z-index: 0;
  overflow: hidden;
  background:
    linear-gradient(153deg, transparent 0 67%, rgba(0,0,0,.055) 67.2% 68%, transparent 68.2%),
    linear-gradient(25deg, transparent 0 69%, rgba(0,0,0,.045) 69.2% 70%, transparent 70.2%),
    linear-gradient(to bottom, #f3f2ee 0 56%, #f9f8f4 56.2% 100%);
}

.room-fallback::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(30,30,28,.08), transparent 16% 78%, rgba(30,30,28,.08));
}

.fallback-window { position: absolute; inset-block-start: 11%; inset-inline-start: 15%; width: 20%; height: 35%; border: 8px solid #e2e0da; background: linear-gradient(145deg, #dbe7e8, #faf9f5); box-shadow: 20px 30px 50px rgba(49,61,62,.09); }
.fallback-window::before, .fallback-window::after { content: ""; position: absolute; background: #e2e0da; }
.fallback-window::before { inset-inline-start: 48%; inset-block: 0; width: 6px; }
.fallback-window::after { inset-inline: 0; inset-block-start: 52%; height: 6px; }
.fallback-shadow { position: absolute; width: 23%; height: 31%; inset-inline-start: 20%; inset-block-start: 51%; background: linear-gradient(135deg, rgba(76,91,91,.08), transparent 70%); transform: skewX(-34deg); filter: blur(3px); }
.fallback-plinth { position: absolute; inset-inline-end: 12%; inset-block-end: 17%; width: 15%; height: 25%; background: #e6e2db; box-shadow: -22px 24px 40px rgba(40,37,32,.1); }

.surface-layer {
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  clip-path: inset(0 calc(100% - var(--compare)) 0 0);
  transition: opacity .3s ease;
}

html[dir="ltr"] .surface-layer { clip-path: inset(0 0 0 calc(100% - var(--compare))); }
.studio-viewport.has-selection .surface-layer { opacity: 1; }

.geometry-scene {
  z-index: 2;
  display: none;
  overflow: hidden;
  background: #c9c4bb;
}

.geometry-scene::after {
  content: "";
  position: absolute;
  z-index: 3;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 30% 18%, rgba(255,255,255,.13), transparent 34%),
    linear-gradient(115deg, rgba(255,242,218,.055), transparent 46%, rgba(21,17,13,.075));
  mix-blend-mode: soft-light;
  opacity: .78;
}

.geometry-base { z-index: 0; }
.geometry-surface-layer { z-index: 1; }
.studio-viewport.is-geometry .photo-scene { display: none; }
.studio-viewport.is-geometry .geometry-scene { display: block; }

.comparison-shade { z-index: 4; pointer-events: none; background: linear-gradient(100deg, rgba(255,255,255,.04), transparent 45%, rgba(0,0,0,.05)); mix-blend-mode: soft-light; }

.comparison-divider {
  position: absolute;
  z-index: 12;
  inset-block: 0;
  inset-inline-start: var(--compare);
  width: 1px;
  background: rgba(255,255,255,.86);
  box-shadow: 0 0 0 1px rgba(0,0,0,.14), 0 0 18px rgba(0,0,0,.22);
  opacity: 0;
  transform: translateX(-50%);
  pointer-events: none;
}

.comparison-divider i { position: absolute; inset-block-start: 50%; inset-inline-start: 50%; width: 31px; height: 42px; border: 1px solid rgba(255,255,255,.88); background: rgba(25,24,21,.58); transform: translate(-50%, -50%); backdrop-filter: blur(10px); }
.comparison-divider i::before, .comparison-divider i::after { content: ""; position: absolute; inset-block-start: 50%; width: 6px; height: 6px; border-block-start: 1px solid #fff; border-inline-start: 1px solid #fff; }
.comparison-divider i::before { inset-inline-start: 7px; transform: translateY(-50%) rotate(-45deg); }
.comparison-divider i::after { inset-inline-end: 7px; transform: translateY(-50%) rotate(135deg); }
.studio-viewport.has-selection .comparison-divider { opacity: 1; }
html[dir="ltr"] .comparison-divider { inset-inline-start: calc(100% - var(--compare)); }

.viewport-labels { position: absolute; z-index: 7; inset-block-start: 15px; inset-inline: 15px; display: flex; justify-content: space-between; pointer-events: none; }
.viewport-labels span { padding: 6px 9px; background: rgba(20,19,17,.58); color: #fff; font-size: .56rem; font-weight: 600; backdrop-filter: blur(8px); opacity: 0; transition: opacity .2s ease; }
.studio-viewport.has-selection .viewport-labels span { opacity: 1; }

.empty-prompt {
  position: absolute;
  z-index: 10;
  inset-inline-start: 50%;
  inset-block-end: 7%;
  width: min(380px, calc(100% - 36px));
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  padding: 15px 17px;
  background: rgba(250,249,245,.89);
  border: 1px solid rgba(25,24,21,.13);
  box-shadow: 0 18px 45px rgba(28,26,22,.13);
  transform: translateX(-50%);
  backdrop-filter: blur(14px);
  transition: opacity .25s ease, transform .4s var(--ease-out);
}

html[dir="rtl"] .empty-prompt { transform: translateX(50%); }
.studio-viewport.has-selection .empty-prompt { opacity: 0; transform: translate(-50%, 14px); pointer-events: none; }
html[dir="rtl"] .studio-viewport.has-selection .empty-prompt { transform: translate(50%, 14px); }
.prompt-icon { grid-row: 1 / 3; width: 39px; height: 39px; display: grid; place-items: center; background: var(--charcoal); color: #f8f4eb; }
.prompt-icon svg { width: 21px; }
.empty-prompt strong { font-size: .76rem; }
.empty-prompt small { color: #615d56; font-size: .63rem; }

.active-surface {
  position: absolute;
  z-index: 9;
  inset-inline-start: 16px;
  inset-block-end: 17px;
  display: grid;
  grid-template-columns: 42px auto 34px;
  align-items: center;
  gap: 10px;
  min-width: 230px;
  padding: 8px;
  background: rgba(25,24,21,.79);
  color: #fff;
  backdrop-filter: blur(14px);
}
.active-surface > span { width: 42px; aspect-ratio: 1; background-color: #d9d0c1; background-image: var(--swatch-pattern); background-size: cover; }
.active-surface p { margin: 0; display: flex; flex-direction: column; line-height: 1.35; }
.active-surface small { color: #bbb6ad; font-size: .52rem; }
.active-surface strong { font-size: .7rem; font-weight: 500; }
.active-surface button { width: 34px; height: 34px; display: grid; place-items: center; border: 0; background: rgba(255,255,255,.1); color: #fff; }
.active-surface button svg { width: 14px; }

.view-mode-badge {
  position: absolute;
  z-index: 11;
  inset-block-start: 16px;
  inset-inline-start: 50%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: rgba(22,21,19,.68);
  color: #fff;
  font-family: var(--font-en);
  font-size: .48rem;
  font-weight: 700;
  letter-spacing: .1em;
  transform: translateX(-50%);
  backdrop-filter: blur(12px);
}
html[dir="rtl"] .view-mode-badge { transform: translateX(50%); }
.view-mode-badge i { width: 6px; height: 6px; border-radius: 50%; background: #72bd92; box-shadow: 0 0 0 4px rgba(114,189,146,.15); }

.camera-hud {
  position: absolute;
  z-index: 13;
  inset-block-start: 52px;
  inset-inline-end: 16px;
  display: flex;
  align-items: center;
  background: rgba(22,21,19,.7);
  color: #fff;
  backdrop-filter: blur(12px);
}
.camera-hud button { width: 44px; height: 44px; display: grid; place-items: center; padding: 0; border: 0; border-inline-end: 1px solid rgba(255,255,255,.15); background: transparent; }
.camera-hud button:last-child { border-inline-start: 1px solid rgba(255,255,255,.15); border-inline-end: 0; }
.camera-hud button:hover { background: rgba(255,255,255,.12); }
.camera-hud svg { width: 14px; }
.camera-hud output { min-width: 46px; direction: ltr; text-align: center; font-family: var(--font-en); font-size: .49rem; }

.stage-tools { position: absolute; z-index: 9; inset-block-end: 17px; inset-inline-end: 16px; display: flex; gap: 7px; }
.stage-tools button { min-height: 44px; display: flex; align-items: center; gap: 8px; padding-inline: 12px; border: 1px solid rgba(255,255,255,.27); background: rgba(25,24,21,.72); color: #fff; backdrop-filter: blur(12px); font-size: .58rem; transition: background .2s ease; }
.stage-tools button:not(:disabled):hover { background: rgba(25,24,21,.91); }
.stage-tools svg { width: 15px; }

.gesture-hint {
  position: absolute;
  z-index: 8;
  inset-inline-start: 50%;
  inset-block-end: 17px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 8px 11px;
  background: rgba(22,21,19,.58);
  color: #fff;
  font-size: .5rem;
  transform: translateX(-50%);
  pointer-events: none;
  backdrop-filter: blur(10px);
}
html[dir="rtl"] .gesture-hint { transform: translateX(50%); }
.gesture-hint svg { width: 15px; }

.compare-control { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; margin-block-start: 13px; font-size: .58rem; font-weight: 600; }
.compare-control label { display: block; }

input[type="range"] {
  width: 100%;
  height: 18px;
  margin: 0;
  appearance: none;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(to right, var(--copper) var(--range-value, 50%), var(--line) var(--range-value, 50%)); }
input[type="range"]::-webkit-slider-thumb { width: 16px; height: 16px; margin-block-start: -7px; appearance: none; border: 2px solid var(--surface); border-radius: 50%; background: var(--copper); box-shadow: 0 0 0 1px var(--copper); }
input[type="range"]::-moz-range-track { height: 2px; background: var(--line); }
input[type="range"]::-moz-range-progress { height: 2px; background: var(--copper); }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border: 2px solid var(--surface); border-radius: 50%; background: var(--copper); box-shadow: 0 0 0 1px var(--copper); }

.render-note { min-height: 47px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding: 10px 2px 0; }
.live-dot { position: relative; width: 7px; height: 7px; border-radius: 50%; background: #4f916b; box-shadow: 0 0 0 4px rgba(79,145,107,.12); }
.render-note p { margin: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; }
.render-note strong { font-family: var(--font-en); font-size: .5rem; letter-spacing: .1em; }
.render-note small, .render-note output { color: var(--ink-soft); font-size: .56rem; }

.studio-controls { min-width: 0; border-inline-start: 1px solid var(--line); }
.control-section { padding: 27px clamp(20px, 2.3vw, 34px); border-block-end: 1px solid var(--line); }
.control-heading { display: flex; align-items: flex-start; gap: 13px; margin-block-end: 18px; }
.control-heading > span { min-width: 25px; padding-block-start: 2px; color: var(--copper); font-family: var(--font-en); font-size: .52rem; font-weight: 700; }
.control-heading > div { display: flex; flex-direction: column; }
.control-heading strong { font-size: .79rem; font-weight: 650; }
.control-heading small { color: var(--ink-soft); font-size: .57rem; }

.room-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.room-list button { min-width: 0; padding: 5px; border: 1px solid var(--line); background: transparent; text-align: start; transition: border-color .2s ease, background-color .2s ease; }
.room-list button:hover { border-color: var(--line-strong); }
.room-list button.is-active { border-color: var(--copper); background: color-mix(in srgb, var(--copper) 6%, transparent); }
.room-list strong, .room-list small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.room-list strong { padding: 7px 3px 0; font-size: .57rem; font-weight: 600; }
.room-list small { padding-inline: 3px; color: var(--ink-soft); font-family: var(--font-en); font-size: .39rem; letter-spacing: .04em; }
.room-thumb { display: block; aspect-ratio: 1.35; background-position: center; background-size: cover; filter: saturate(.68); }
.room-thumb--white { background-image: url("assets/images/studio-room-white-v2.webp"), url("assets/images/studio-white-room.webp"), linear-gradient(145deg,#efefec,#dad8d1); }
.room-thumb--living { background-image: url("assets/images/studio-room-living-v2.webp"), url("assets/images/hero-living.webp"), linear-gradient(145deg,#d9d1c3,#a99d8b); }
.room-thumb--bathroom { background-image: url("assets/images/studio-room-bath-v2.webp"), url("assets/images/room-bathroom.webp"), linear-gradient(145deg,#d5d4cf,#8b8d8c); }

.segmented, .mode-segmented, .mini-segmented { display: grid; border: 1px solid var(--line); }
.segmented { grid-template-columns: repeat(3, 1fr); }
.mode-segmented { grid-template-columns: 1fr 1fr; }
.segmented button, .mode-segmented button { min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 8px; border: 0; background: transparent; color: var(--ink-soft); font-size: .63rem; transition: background .2s ease, color .2s ease; }
.segmented button + button, .mode-segmented button + button { border-inline-start: 1px solid var(--line); }
.segmented svg, .mode-segmented svg { width: 18px; }
.segmented button.is-active, .mode-segmented button.is-active { background: var(--ink); color: var(--paper); }

.tile-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; max-height: 300px; overflow: auto; scrollbar-width: thin; scrollbar-color: var(--copper) transparent; }
.tile-choice { min-width: 0; padding: 5px; border: 1px solid transparent; background: transparent; text-align: start; transition: border-color .2s ease, background-color .2s ease; }
.tile-choice:hover { border-color: var(--line-strong); }
.tile-choice.is-active { border-color: var(--copper); background: color-mix(in srgb, var(--copper) 6%, transparent); }
.tile-choice__art { position: relative; display: block; aspect-ratio: 1; overflow: hidden; background-color: var(--tile-base, #ddd3c3); background-image: var(--tile-pattern); background-position: center; background-size: cover; }
.tile-choice__art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(145deg,rgba(255,255,255,.2),transparent 45%,rgba(0,0,0,.09)); mix-blend-mode: soft-light; }
.tile-choice strong, .tile-choice small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tile-choice strong { padding: 7px 2px 0; font-size: .54rem; font-weight: 600; }
.tile-choice small { padding-inline: 2px; color: var(--ink-soft); font-family: var(--font-en); font-size: .41rem; }

.field-group + .field-group, .field-group + .range-field, .range-field + .color-field, .color-field + .range-field, .range-field + .range-field { margin-block-start: 20px; }
.field-label, .color-field legend { display: block; margin-block-end: 9px; color: var(--ink-soft); font-size: .58rem; font-weight: 600; }
.mini-segmented { grid-template-columns: repeat(3, 1fr); }
.mini-segmented button { min-width: 0; height: 39px; border: 0; background: transparent; direction: ltr; color: var(--ink-soft); font-family: var(--font-en); font-size: .52rem; transition: background .2s ease, color .2s ease; }
.mini-segmented button + button { border-inline-start: 1px solid var(--line); }
.mini-segmented button.is-active { background: var(--ink); color: var(--paper); }

.layout-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.layout-options button { min-width: 0; display: grid; gap: 7px; place-items: center; padding: 9px 4px 7px; border: 1px solid var(--line); background: transparent; color: var(--ink-soft); transition: border-color .2s ease, color .2s ease; }
.layout-options button.is-active { border-color: var(--copper); color: var(--ink); }
.layout-options small { font-size: .5rem; }
.layout-icon { width: 36px; height: 23px; opacity: .75; background-size: 12px 12px; }
.layout-icon--straight { background-image: linear-gradient(var(--line-strong) 1px, transparent 1px), linear-gradient(90deg, var(--line-strong) 1px, transparent 1px); }
.layout-icon--staggered { background-image: linear-gradient(var(--line-strong) 1px, transparent 1px), linear-gradient(90deg, var(--line-strong) 1px, transparent 1px); transform: skewX(-16deg); }
.layout-icon--diagonal { background-image: linear-gradient(var(--line-strong) 1px, transparent 1px), linear-gradient(90deg, var(--line-strong) 1px, transparent 1px); transform: rotate(45deg) scale(.7); }

.range-field { display: block; }
.range-field > span { display: flex; justify-content: space-between; gap: 20px; margin-block-end: 4px; }
.range-field b { color: var(--ink-soft); font-size: .58rem; font-weight: 600; }
.range-field output { direction: ltr; font-family: var(--font-en); font-size: .52rem; }

.camera-section .range-field + .range-field { margin-block-start: 17px; }
.camera-axis-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-block-start: 17px; }
.camera-axis-grid .range-field + .range-field { margin-block-start: 0; }
.camera-reset { width: 100%; min-height: 42px; display: flex; align-items: center; justify-content: center; gap: 9px; margin-block-start: 20px; border: 1px solid var(--line-strong); background: transparent; color: var(--ink-soft); font-size: .58rem; transition: color .2s ease, border-color .2s ease; }
.camera-reset:hover { color: var(--copper); border-color: var(--copper); }
.camera-reset svg { width: 15px; }

.calibration-panel { margin-block-start: 17px; border: 1px solid var(--line); }
.calibration-panel summary { position: relative; display: flex; flex-direction: column; padding: 12px 35px 12px 12px; cursor: pointer; list-style: none; }
.calibration-panel summary::-webkit-details-marker { display: none; }
.calibration-panel summary::before, .calibration-panel summary::after { content: ""; position: absolute; inset-inline-end: 14px; inset-block-start: 20px; width: 10px; height: 1px; background: var(--ink); transition: transform .2s ease; }
.calibration-panel summary::after { transform: rotate(90deg); }
.calibration-panel[open] summary::after { transform: rotate(0); }
.calibration-panel summary span { font-size: .6rem; font-weight: 600; }
.calibration-panel summary small { color: var(--ink-soft); font-size: .5rem; }
.calibration-panel > .range-field { margin: 0 13px 14px; }
.calibration-panel > button { width: calc(100% - 26px); min-height: 36px; margin: 0 13px 13px; border: 1px solid var(--line); background: transparent; color: var(--ink-soft); font-size: .52rem; }
.calibration-panel > button:hover { border-color: var(--copper); color: var(--copper); }
.studio-controls.is-geometry-mode .calibration-panel { opacity: .45; pointer-events: none; }

.color-field { display: flex; align-items: center; gap: 9px; min-width: 0; margin-inline: 0; padding: 0; border: 0; }
.color-field legend { float: inline-start; min-width: 62px; margin: 0; padding: 0; }
.color-field button { position: relative; width: 25px; height: 25px; border: 1px solid var(--line-strong); border-radius: 50%; background: var(--grout); }
.color-field button.is-active::after { content: ""; position: absolute; inset: -4px; border: 1px solid var(--copper); border-radius: 50%; }

.control-actions { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 25px clamp(20px, 2.3vw, 34px) 32px; }
.primary-action, .reset-action { min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid var(--ink); transition: background .2s ease, color .2s ease; }
.primary-action { background: var(--ink); color: var(--paper); }
.primary-action:not(:disabled):hover { background: var(--copper); border-color: var(--copper); color: #fff; }
.primary-action svg { width: 17px; }
html[dir="rtl"] .primary-action svg { transform: scaleX(-1); }
.reset-action { padding-inline: 14px; background: transparent; font-size: .62rem; }
.reset-action:hover { border-color: var(--copper); color: var(--copper); }
.reset-action svg { width: 16px; }

.studio-footnote { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-block: 52px clamp(90px, 10vw, 160px); background: var(--line); border: 1px solid var(--line); }
.studio-footnote p { min-width: 0; display: grid; grid-template-columns: auto 1fr; column-gap: 13px; margin: 0; padding: clamp(24px, 3vw, 42px); background: var(--paper); }
.studio-footnote span { grid-row: 1 / 3; color: var(--copper); font-family: var(--font-en); font-size: .55rem; }
.studio-footnote strong { font-size: .75rem; }
.studio-footnote small { max-width: 350px; color: var(--ink-soft); font-size: .6rem; }

.studio-toast { position: fixed; z-index: 3000; inset-inline-start: 50%; inset-block-end: 24px; min-width: min(390px, calc(100vw - 32px)); display: flex; align-items: center; gap: 11px; padding: 12px 16px; background: var(--charcoal); color: #f8f4eb; box-shadow: 0 18px 60px rgba(0,0,0,.24); transform: translateX(-50%); }
.studio-toast[hidden] { display: none !important; }
html[dir="rtl"] .studio-toast { transform: translateX(50%); }
.studio-toast > span { width: 8px; height: 8px; border-radius: 50%; background: #70b18c; }
.studio-toast p { margin: 0; font-size: .68rem; }

.studio-viewport:fullscreen { width: 100vw; height: 100vh; aspect-ratio: auto; min-height: 0; background: #dad7d0; }
.studio-viewport:fullscreen .stage-tools { inset-block-end: 24px; inset-inline-end: 24px; }
.studio-viewport:fullscreen .active-surface { inset-block-end: 24px; inset-inline-start: 24px; }
.studio-viewport.is-fallback-fullscreen { position: fixed; z-index: 2500; inset: 0; width: 100vw; height: 100vh; aspect-ratio: auto; min-height: 0; }

html.is-embedded { background: var(--surface); }
html.is-embedded body { background: var(--surface); }
.is-embedded .studio-skip,
.is-embedded .studio-header,
.is-embedded .studio-intro,
.is-embedded .studio-footnote { display: none; }
.is-embedded main { width: 100%; margin: 0; }
.is-embedded .studio-workspace { border: 0; box-shadow: none; }
.is-embedded .studio-canvas-column { inset-block-start: 12px; }
.is-embedded .studio-controls { background: var(--surface); }
.is-embedded .studio-toast { inset-block-end: 14px; }

@media (max-width: 1180px) {
  .studio-workspace { grid-template-columns: minmax(0, 1fr) 360px; }
  .tile-picker { grid-template-columns: repeat(2, 1fr); }
  .stage-tools button span { display: none; }
  .stage-tools button { width: 44px; justify-content: center; padding: 0; }
}

@media (max-width: 920px) {
  :root { --header-height: 72px; }
  .studio-header { padding-inline: 18px; }
  .back-link span { display: none; }
  main { width: min(100% - 28px, 760px); }
  .studio-intro { grid-template-columns: 1fr; gap: 24px; padding-block: 58px 42px; }
  .studio-intro > p { max-width: 590px; }
  .studio-workspace { grid-template-columns: 1fr; }
  .studio-canvas-column { position: relative; inset-block-start: auto; }
  .studio-controls { border-inline-start: 0; border-block-start: 1px solid var(--line); }
  .studio-viewport { min-height: 0; aspect-ratio: 16 / 10; }
  .tile-picker { grid-template-columns: repeat(4, 1fr); max-height: none; }
  .studio-footnote { grid-template-columns: 1fr; }
  .is-embedded .studio-canvas-column { inset-block-start: auto; }
  .is-embedded .tile-picker { max-height: 300px; overflow: auto; }
}

@media (max-width: 620px) {
  .studio-header { gap: 8px; }
  .studio-brand small { display: none; }
  .studio-brand strong { font-size: .73rem; }
  .studio-brand__mark { width: 25px; height: 25px; }
  .language-switcher button { min-width: 29px; height: 32px; font-size: .48rem; }
  .icon-button { width: 39px; height: 39px; }
  .back-link { display: none; }
  main { width: calc(100% - 20px); }
  .studio-intro { padding-block: 46px 33px; }
  .eyebrow { margin-block-end: 18px; }
  .studio-intro h1 { font-size: clamp(2.75rem, 15vw, 4.5rem); }
  .studio-intro > p { font-size: .76rem; }
  .studio-canvas-column { padding: 7px; }
  .studio-viewport { aspect-ratio: 16 / 10; }
  .viewport-labels { inset-block-start: 9px; inset-inline: 9px; }
  .empty-prompt { inset-block-end: 18%; padding: 10px 12px; }
  .empty-prompt .prompt-icon { width: 32px; height: 32px; }
  .empty-prompt strong { font-size: .62rem; }
  .empty-prompt small { font-size: .52rem; }
  .active-surface { inset-inline: 9px; inset-block-end: 9px; min-width: 0; grid-template-columns: 35px minmax(0,1fr) 32px; }
  .active-surface > span { width: 35px; }
  .active-surface p { max-width: 130px; }
  .stage-tools { inset-block-start: 9px; inset-block-end: auto; inset-inline-end: 9px; }
  .stage-tools button { width: 44px; height: 44px; }
  .camera-hud { inset-block-start: auto; inset-block-end: 8px; inset-inline-end: 8px; }
  .camera-hud button { width: 44px; height: 44px; }
  .camera-hud output { min-width: 62px; }
  .gesture-hint, .view-mode-badge { display: none; }
  .active-surface { display: none; }
  .render-note { grid-template-columns: auto 1fr; }
  .render-note output { grid-column: 2; }
  .render-note p { display: grid; gap: 0; }
  .control-section { padding: 24px 18px; }
  .camera-axis-grid { grid-template-columns: 1fr; gap: 17px; }
  .room-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .room-list small { display: none; }
  .tile-picker { display: flex; margin-inline: -18px; padding-inline: 18px; gap: 8px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
  .tile-picker::-webkit-scrollbar { display: none; }
  .tile-choice { flex: 0 0 112px; scroll-snap-align: start; }
  .control-actions { padding-inline: 18px; grid-template-columns: 1fr; }
  .reset-action { min-height: 42px; }
  .studio-footnote { margin-block-start: 30px; }
  .studio-footnote p { padding: 23px 18px; }
}

@media (max-width: 380px) {
  .studio-brand > span:last-child { display: none; }
  .studio-intro h1 { font-size: 2.65rem; }
  .room-list strong { font-size: .5rem; }
  .empty-prompt { width: calc(100% - 20px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition-duration: .01ms !important; }
}

@media (forced-colors: active) {
  .tile-choice.is-active, .room-list button.is-active, .layout-options button.is-active { outline: 2px solid CanvasText; }
  .live-dot { border: 2px solid CanvasText; }
}